(en) R. Bouckaert, P. Lemey, M. Dunn, S. J. Greenhill, A. V. Alekseyenko, A. J. Drummond, R. D. Gray, M. A. Suchard et Q. D. Atkinson, « Mapping the Origins and Expansion of the Indo-European Language Family », Science, vol. 337, no 6097, , p. 957–960 (PMID22923579, PMCID4112997, DOI10.1126/science.1219669, Bibcode2012Sci...337..957B)
(en) R. Bouckaert, P. Lemey, M. Dunn, S. J. Greenhill, A. V. Alekseyenko, A. J. Drummond, R. D. Gray, M. A. Suchard et Q. D. Atkinson, « Mapping the Origins and Expansion of the Indo-European Language Family », Science, vol. 337, no 6097, , p. 957–960 (PMID22923579, PMCID4112997, DOI10.1126/science.1219669, Bibcode2012Sci...337..957B)
(en) R. Bouckaert, P. Lemey, M. Dunn, S. J. Greenhill, A. V. Alekseyenko, A. J. Drummond, R. D. Gray, M. A. Suchard et Q. D. Atkinson, « Mapping the Origins and Expansion of the Indo-European Language Family », Science, vol. 337, no 6097, , p. 957–960 (PMID22923579, PMCID4112997, DOI10.1126/science.1219669, Bibcode2012Sci...337..957B)